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influxdb/cmd/influx/main.go

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package main
import (
"encoding/csv"
"encoding/json"
"flag"
"fmt"
"io"
"net"
"net/url"
"os"
"os/user"
"path/filepath"
"sort"
"strconv"
"strings"
"text/tabwriter"
"github.com/influxdb/influxdb/client"
"github.com/influxdb/influxdb/importer/v8"
"github.com/peterh/liner"
)
// These variables are populated via the Go linker.
var (
version string = "0.9"
)
const (
default_format = "column"
)
type CommandLine struct {
Client *client.Client
Line *liner.State
Host string
Port int
Username string
Password string
Database string
Ssl bool
RetentionPolicy string
Version string
Pretty bool // controls pretty print for json
Format string // controls the output format. Valid values are json, csv, or column
Execute string
ShowVersion bool
Import bool
Path string
Compressed bool
}
func main() {
c := CommandLine{}
fs := flag.NewFlagSet("InfluxDB shell version "+version, flag.ExitOnError)
fs.StringVar(&c.Host, "host", client.DefaultHost, "Influxdb host to connect to.")
fs.IntVar(&c.Port, "port", client.DefaultPort, "Influxdb port to connect to.")
fs.StringVar(&c.Username, "username", c.Username, "Username to connect to the server.")
fs.StringVar(&c.Password, "password", c.Password, `Password to connect to the server. Leaving blank will prompt for password (--password="").`)
fs.StringVar(&c.Database, "database", c.Database, "Database to connect to the server.")
fs.BoolVar(&c.Ssl, "ssl", false, "Use https for connecting to cluster.")
fs.StringVar(&c.Format, "format", default_format, "Format specifies the format of the server responses: json, csv, or column.")
fs.BoolVar(&c.Pretty, "pretty", false, "Turns on pretty print for the json format.")
fs.StringVar(&c.Execute, "execute", c.Execute, "Execute command and quit.")
fs.BoolVar(&c.ShowVersion, "version", false, "Displays the InfluxDB version.")
fs.BoolVar(&c.Import, "import", false, "Import a previous database.")
fs.StringVar(&c.Path, "path", "", "path to the file to import")
fs.BoolVar(&c.Compressed, "compressed", false, "set to true if the import file is compressed")
// Define our own custom usage to print
fs.Usage = func() {
fmt.Println(`Usage of influx:
-version
Display the version and exit.
-host 'host name'
Host to connect to.
-port 'port #'
Port to connect to.
-database 'database name'
Database to connect to the server.
-password 'password'
Password to connect to the server. Leaving blank will prompt for password (--password '').
-username 'username'
Username to connect to the server.
-ssl
Use https for requests.
-execute 'command'
Execute command and quit.
-format 'json|csv|column'
Format specifies the format of the server responses: json, csv, or column.
-pretty
Turns on pretty print for the json format.
-import
Import a previous database export from file
-path
Path to file to import
-compressed
Set to true if the import file is compressed
Examples:
# Use influx in a non-interactive mode to query the database "metrics" and pretty print json:
$ influx -database 'metrics' -execute 'select * from cpu' -format 'json' -pretty
# Connect to a specific database on startup and set database context:
$ influx -database 'metrics' -host 'localhost' -port '8086'
`)
}
fs.Parse(os.Args[1:])
if c.ShowVersion {
showVersion()
os.Exit(0)
}
var promptForPassword bool
// determine if they set the password flag but provided no value
for _, v := range os.Args {
v = strings.ToLower(v)
if (strings.HasPrefix(v, "-password") || strings.HasPrefix(v, "--password")) && c.Password == "" {
promptForPassword = true
break
}
}
c.Line = liner.NewLiner()
defer c.Line.Close()
if promptForPassword {
p, e := c.Line.PasswordPrompt("password: ")
if e != nil {
fmt.Println("Unable to parse password.")
} else {
c.Password = p
}
}
if err := c.connect(""); err != nil {
}
if c.Execute == "" && !c.Import {
fmt.Printf("Connected to %s version %s\n", c.Client.Addr(), c.Version)
}
if c.Execute != "" {
if err := c.ExecuteQuery(c.Execute); err != nil {
c.Line.Close()
os.Exit(1)
}
c.Line.Close()
os.Exit(0)
}
if c.Import {
path := net.JoinHostPort(c.Host, strconv.Itoa(c.Port))
u, e := client.ParseConnectionString(path, c.Ssl)
if e != nil {
fmt.Println(e)
return
}
config := v8.NewConfig()
config.Username = c.Username
config.Password = c.Password
config.Precision = "ns"
config.WriteConsistency = "any"
config.Path = c.Path
config.Version = version
config.URL = u
config.Compressed = c.Compressed
i := v8.NewImporter(config)
if err := i.Import(); err != nil {
fmt.Printf("ERROR: %s\n", err)
c.Line.Close()
os.Exit(1)
}
c.Line.Close()
os.Exit(0)
}
showVersion()
var historyFile string
usr, err := user.Current()
// Only load history if we can get the user
if err == nil {
historyFile = filepath.Join(usr.HomeDir, ".influx_history")
if f, err := os.Open(historyFile); err == nil {
c.Line.ReadHistory(f)
f.Close()
}
}
for {
l, e := c.Line.Prompt("> ")
if e != nil {
break
}
if c.ParseCommand(l) {
// write out the history
if len(historyFile) > 0 {
c.Line.AppendHistory(l)
if f, err := os.Create(historyFile); err == nil {
c.Line.WriteHistory(f)
f.Close()
}
}
} else {
break // exit main loop
}
}
}
func showVersion() {
fmt.Println("InfluxDB shell " + version)
}
func (c *CommandLine) ParseCommand(cmd string) bool {
lcmd := strings.TrimSpace(strings.ToLower(cmd))
switch {
case strings.HasPrefix(lcmd, "exit"):
// signal the program to exit
return false
case strings.HasPrefix(lcmd, "gopher"):
c.gopher()
case strings.HasPrefix(lcmd, "connect"):
c.connect(cmd)
case strings.HasPrefix(lcmd, "auth"):
c.SetAuth(cmd)
case strings.HasPrefix(lcmd, "help"):
c.help()
case strings.HasPrefix(lcmd, "format"):
c.SetFormat(cmd)
case strings.HasPrefix(lcmd, "settings"):
c.Settings()
case strings.HasPrefix(lcmd, "pretty"):
c.Pretty = !c.Pretty
if c.Pretty {
fmt.Println("Pretty print enabled")
} else {
fmt.Println("Pretty print disabled")
}
case strings.HasPrefix(lcmd, "use"):
c.use(cmd)
case strings.HasPrefix(lcmd, "insert"):
c.Insert(cmd)
case lcmd == "":
break
default:
c.ExecuteQuery(cmd)
}
return true
}
func (c *CommandLine) connect(cmd string) error {
var cl *client.Client
var u url.URL
// Remove the "connect" keyword if it exists
path := strings.TrimSpace(strings.Replace(cmd, "connect", "", -1))
// If they didn't provide a connection string, use the current settings
if path == "" {
path = net.JoinHostPort(c.Host, strconv.Itoa(c.Port))
}
var e error
u, e = client.ParseConnectionString(path, c.Ssl)
if e != nil {
return e
}
config := client.NewConfig()
config.URL = u
config.Username = c.Username
config.Password = c.Password
config.UserAgent = "InfluxDBShell/" + version
cl, err := client.NewClient(config)
if err != nil {
return fmt.Errorf("Could not create client %s", err)
}
c.Client = cl
if _, v, e := c.Client.Ping(); e != nil {
return fmt.Errorf("Failed to connect to %s\n", c.Client.Addr())
} else {
c.Version = v
}
return nil
}
func (c *CommandLine) SetAuth(cmd string) {
// If they pass in the entire command, we should parse it
// auth <username> <password>
args := strings.Fields(cmd)
if len(args) == 3 {
args = args[1:]
} else {
args = []string{}
}
if len(args) == 2 {
c.Username = args[0]
c.Password = args[1]
} else {
u, e := c.Line.Prompt("username: ")
if e != nil {
fmt.Printf("Unable to process input: %s", e)
return
}
c.Username = strings.TrimSpace(u)
p, e := c.Line.PasswordPrompt("password: ")
if e != nil {
fmt.Printf("Unable to process input: %s", e)
return
}
c.Password = p
}
// Update the client as well
c.Client.SetAuth(c.Username, c.Password)
}
func (c *CommandLine) use(cmd string) {
args := strings.Split(strings.TrimSuffix(strings.TrimSpace(cmd), ";"), " ")
if len(args) != 2 {
fmt.Printf("Could not parse database name from %q.\n", cmd)
return
}
d := args[1]
c.Database = d
fmt.Printf("Using database %s\n", d)
}
func (c *CommandLine) SetFormat(cmd string) {
// Remove the "format" keyword if it exists
cmd = strings.TrimSpace(strings.Replace(cmd, "format", "", -1))
// normalize cmd
cmd = strings.ToLower(cmd)
switch cmd {
case "json", "csv", "column":
c.Format = cmd
default:
fmt.Printf("Unknown format %q. Please use json, csv, or column.\n", cmd)
}
}
// isWhitespace returns true if the rune is a space, tab, or newline.
func isWhitespace(ch rune) bool { return ch == ' ' || ch == '\t' || ch == '\n' }
// isLetter returns true if the rune is a letter.
func isLetter(ch rune) bool { return (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') }
// isDigit returns true if the rune is a digit.
func isDigit(ch rune) bool { return (ch >= '0' && ch <= '9') }
// isIdentFirstChar returns true if the rune can be used as the first char in an unquoted identifer.
func isIdentFirstChar(ch rune) bool { return isLetter(ch) || ch == '_' }
// isIdentChar returns true if the rune can be used in an unquoted identifier.
func isNotIdentChar(ch rune) bool { return !(isLetter(ch) || isDigit(ch) || ch == '_') }
func parseUnquotedIdentifier(stmt string) (string, string) {
if fields := strings.FieldsFunc(stmt, isNotIdentChar); len(fields) > 0 {
return fields[0], strings.TrimPrefix(stmt, fields[0])
}
return "", stmt
}
func parseDoubleQuotedIdentifier(stmt string) (string, string) {
escapeNext := false
fields := strings.FieldsFunc(stmt, func(ch rune) bool {
if ch == '\\' {
escapeNext = true
} else if ch == '"' {
if !escapeNext {
return true
}
escapeNext = false
}
return false
})
if len(fields) > 0 {
return fields[0], strings.TrimPrefix(stmt, "\""+fields[0]+"\"")
}
return "", stmt
}
func parseNextIdentifier(stmt string) (ident, remainder string) {
if len(stmt) > 0 {
switch {
case isWhitespace(rune(stmt[0])):
return parseNextIdentifier(stmt[1:])
case isIdentFirstChar(rune(stmt[0])):
return parseUnquotedIdentifier(stmt)
case stmt[0] == '"':
return parseDoubleQuotedIdentifier(stmt)
}
}
return "", stmt
}
func (c *CommandLine) parseInto(stmt string) string {
ident, stmt := parseNextIdentifier(stmt)
if strings.HasPrefix(stmt, ".") {
c.Database = ident
fmt.Printf("Using database %s\n", c.Database)
ident, stmt = parseNextIdentifier(stmt[1:])
}
if strings.HasPrefix(stmt, " ") {
c.RetentionPolicy = ident
fmt.Printf("Using retention policy %s\n", c.RetentionPolicy)
return stmt[1:]
}
return stmt
}
func (c *CommandLine) Insert(stmt string) error {
i, point := parseNextIdentifier(stmt)
if !strings.EqualFold(i, "insert") {
fmt.Printf("ERR: found %s, expected INSERT\n", i)
return nil
}
if i, r := parseNextIdentifier(point); strings.EqualFold(i, "into") {
point = c.parseInto(r)
}
_, err := c.Client.Write(client.BatchPoints{
Points: []client.Point{
client.Point{Raw: point},
},
Database: c.Database,
RetentionPolicy: c.RetentionPolicy,
Precision: "n",
WriteConsistency: client.ConsistencyAny,
})
if err != nil {
fmt.Printf("ERR: %s\n", err)
if c.Database == "" {
fmt.Println("Note: error may be due to not setting a database or retention policy.")
fmt.Println(`Please set a database with the command "use <database>" or`)
fmt.Println("INSERT INTO <database>.<retention-policy> <point>")
}
return err
}
return nil
}
func (c *CommandLine) ExecuteQuery(query string) error {
response, err := c.Client.Query(client.Query{Command: query, Database: c.Database})
if err != nil {
fmt.Printf("ERR: %s\n", err)
return err
}
c.FormatResponse(response, os.Stdout)
if err := response.Error(); err != nil {
fmt.Printf("ERR: %s\n", response.Error())
if c.Database == "" {
fmt.Println("Warning: It is possible this error is due to not setting a database.")
fmt.Println(`Please set a database with the command "use <database>".`)
}
return err
}
return nil
}
func (c *CommandLine) FormatResponse(response *client.Response, w io.Writer) {
switch c.Format {
case "json":
c.writeJSON(response, w)
case "csv":
c.writeCSV(response, w)
case "column":
c.writeColumns(response, w)
default:
fmt.Fprintf(w, "Unknown output format %q.\n", c.Format)
}
}
func (c *CommandLine) writeJSON(response *client.Response, w io.Writer) {
var data []byte
var err error
if c.Pretty {
data, err = json.MarshalIndent(response, "", " ")
} else {
data, err = json.Marshal(response)
}
if err != nil {
fmt.Fprintf(w, "Unable to parse json: %s\n", err)
return
}
fmt.Fprintln(w, string(data))
}
func (c *CommandLine) writeCSV(response *client.Response, w io.Writer) {
csvw := csv.NewWriter(w)
for _, result := range response.Results {
// Create a tabbed writer for each result as they won't always line up
rows := c.formatResults(result, "\t")
for _, r := range rows {
csvw.Write(strings.Split(r, "\t"))
}
csvw.Flush()
}
}
func (c *CommandLine) writeColumns(response *client.Response, w io.Writer) {
for _, result := range response.Results {
// Create a tabbed writer for each result a they won't always line up
w := new(tabwriter.Writer)
w.Init(os.Stdout, 0, 8, 1, '\t', 0)
csv := c.formatResults(result, "\t")
for _, r := range csv {
fmt.Fprintln(w, r)
}
w.Flush()
}
}
// formatResults will behave differently if you are formatting for columns or csv
func (c *CommandLine) formatResults(result client.Result, separator string) []string {
rows := []string{}
// Create a tabbed writer for each result a they won't always line up
for i, row := range result.Series {
// gather tags
tags := []string{}
for k, v := range row.Tags {
tags = append(tags, fmt.Sprintf("%s=%s", k, v))
sort.Strings(tags)
}
columnNames := []string{}
// Only put name/tags in a column if format is csv
if c.Format == "csv" {
if len(tags) > 0 {
columnNames = append([]string{"tags"}, columnNames...)
}
if row.Name != "" {
columnNames = append([]string{"name"}, columnNames...)
}
}
for _, column := range row.Columns {
columnNames = append(columnNames, column)
}
// Output a line separator if we have more than one set or results and format is column
if i > 0 && c.Format == "column" {
rows = append(rows, "")
}
// If we are column format, we break out the name/tag to seperate lines
if c.Format == "column" {
if row.Name != "" {
n := fmt.Sprintf("name: %s", row.Name)
rows = append(rows, n)
if len(tags) == 0 {
l := strings.Repeat("-", len(n))
rows = append(rows, l)
}
}
if len(tags) > 0 {
t := fmt.Sprintf("tags: %s", (strings.Join(tags, ", ")))
rows = append(rows, t)
}
}
rows = append(rows, strings.Join(columnNames, separator))
// if format is column, break tags to their own line/format
if c.Format == "column" && len(tags) > 0 {
lines := []string{}
for _, columnName := range columnNames {
lines = append(lines, strings.Repeat("-", len(columnName)))
}
rows = append(rows, strings.Join(lines, separator))
}
for _, v := range row.Values {
var values []string
if c.Format == "csv" {
if row.Name != "" {
values = append(values, row.Name)
}
if len(tags) > 0 {
values = append(values, strings.Join(tags, ","))
}
}
for _, vv := range v {
values = append(values, interfaceToString(vv))
}
rows = append(rows, strings.Join(values, separator))
}
// Outout a line separator if in column format
if c.Format == "column" {
rows = append(rows, "")
}
}
return rows
}
func interfaceToString(v interface{}) string {
switch t := v.(type) {
case nil:
return ""
case bool:
return fmt.Sprintf("%v", v)
case int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64, uintptr:
return fmt.Sprintf("%d", t)
case float32, float64:
return fmt.Sprintf("%v", t)
default:
return fmt.Sprintf("%v", t)
}
}
func (c *CommandLine) Settings() {
w := new(tabwriter.Writer)
w.Init(os.Stdout, 0, 8, 1, '\t', 0)
if c.Port > 0 {
fmt.Fprintf(w, "Host\t%s:%d\n", c.Host, c.Port)
} else {
fmt.Fprintf(w, "Host\t%s\n", c.Host)
}
fmt.Fprintf(w, "Username\t%s\n", c.Username)
fmt.Fprintf(w, "Database\t%s\n", c.Database)
fmt.Fprintf(w, "Pretty\t%v\n", c.Pretty)
fmt.Fprintf(w, "Format\t%s\n", c.Format)
fmt.Fprintln(w)
w.Flush()
}
func (c *CommandLine) help() {
fmt.Println(`Usage:
connect <host:port> connect to another node
auth prompt for username and password
pretty toggle pretty print
use <db_name> set current databases
format <format> set the output format: json, csv, or column
settings output the current settings for the shell
exit quit the influx shell
show databases show database names
show series show series information
show measurements show measurement information
show tag keys show tag key information
show tag values show tag value information
a full list of influxql commands can be found at:
https://influxdb.com/docs/v0.9/query_language/spec.html
`)
}
func (c *CommandLine) gopher() {
fmt.Println(`
.-::-::://:-::- .:/++/'
'://:-''/oo+//++o+/.://o- ./+:
.:-. '++- .o/ '+yydhy' o-
.:/. .h: :osoys .smMN- :/
-/:.' s- /MMMymh. '/y/ s'
-+s:'''' d -mMMms// '-/o:
-/++/++/////:. o: '... s- :s.
:+-+s-' ':/' 's- /+ 'o:
'+-'o: /ydhsh. '//. '-o- o-
.y. o: .MMMdm+y ':+++:::/+:.' s:
.-h/ y- 'sdmds'h -+ydds:::-.' 'h.
.//-.d' o: '.' 'dsNMMMNh:.:++' :y
+y. 'd 's. .s:mddds: ++ o/
'N- odd 'o/. './o-s-' .---+++' o-
'N' yNd .://:/:::::. -s -+/s/./s' 'o/'
so' .h '''' ////s: '+. .s +y'
os/-.y' 's' 'y::+ +d'
'.:o/ -+:-:.' so.---.'
o' 'd-.''/s'
.s' :y.''.y
-s mo:::'
:: yh
// '''' /M'
o+ .s///:/. 'N:
:+ /: -s' ho
's- -/s/:+/.+h' +h
ys' ':' '-. -d
oh .h
/o .s
s. .h
-y .d
m/ -h
+d /o
'N- y:
h: m.
s- -d
o- s+
+- 'm'
s/ oo--.
y- /s ':+'
s' 'od--' .d:
-+ ':o: ':+-/+
y- .:+- '
//o- '.:+/.
.-:+/' ''-/+/.
./:' ''.:o+/-'
.+o:/:/+-' ''.-+ooo/-'
o: -h///++////-.
/: .o/
//+ 'y
./sooy.
`)
}
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